[Solved] About The Legendary Weapons Quest

[admiralpabi]

I'm stuck at the librarian, please help me! I have all the requirements but she just says:
"Oh, I wish I had more books...the library looks so bare nowadays..."

[Sensation]

Make sure you have an unslotted memory book, so a memory book [0].

[admiralpabi]

I thought the memo book sold on the shop was good enough. Thank you!!